Strap end button



FIG. 1 is a perspective view of a strap end button showing my design; the broken line showing of a strap segment is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a rear elevational view;

FIG. 3 is a side elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a top plan view; and,

FIG. 6 is a bottom plan view. 

The ornamental design for a strap end button, as shown and described. 